When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch a random digit dialing…

December 20, 2020/in Grade Tutors Science Help Online /by admin

When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch a random digit dialing machine makes 15 calls. What is the probability that exactly 3 calls reach a person?

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When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch a random digit dialing…

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